As Haru and Aiko descended further into the labyrinth, the air grew colder, and the light from the torch seemed to dim. The passageway led them to a large cavern with a high ceiling, where a massive stone structure stood at its center. It was an ancient altar, intricately carved with symbols and depictions of mythical creatures.

The altar appeared to be the heart of the labyrinth, its significance evident in the elaborate design. Haru approached cautiously, his senses on high alert. The carvings on the altar seemed to tell a story, one of a great battle between light and darkness, with ancient heroes and powerful artifacts playing key roles.